Lesson 3.3 - The Digestive System

Your body needs energy to move, to keep warm, and to perform important life functions.  Your body also needs many nutrients to stay healthy.  Your digestive system is responsible for converting food into the required energy and nutrients. 

Read The Digestive System - Catch the Wave on page 188 of your textbook. Then, answer the following questions.

Question 1. What is the role of the digestive system?

Question 2. For what does the body use nutrients?

Question 3. What are the six major types of nutrients?

Question 4. After food is chewed in the mouth, what are the next five main parts of the digestive system?  

 

Check your answers with those that follow.

 

 

 

 

 

 

 

 

 

 

 

 

Answers to Questions:

Question 1. What is the role of the digestive system?

The role of the digestive system is to change the food you eat into nutrients your body cells can use.

Question 2. For what does the body use nutrients?

The body use nutrients for energy, growth, and repair.

Question 3. What are the six major types of nutrients?

The six major types of nutrients are the following:

carbohydrates, proteins, fats, vitamins, minerals, and water.

Question 4. After food is chewed in the mouth, what are the next five main parts of the digestive system?

After food is chewed in the mouth, the next five main parts of the digestive system are the following:

        • esophagus
        • stomach
        • small intestine
        • large intestine
        • anus

 


Go to the next page to continue Lesson 3.